9
6
DSR
Printer
The same as CTS
8
CTS
Printer
Signal “MARK” means the host
is busy and can not receive
data. Signal “SPACE” means
the host is ready to receive
data.
5
GND
Signal Ground
2.3.2 Parallel Interface
The parallel interface of POS88
Ⅴ
printer is compatible with CENTRONICS,
supports BUSY or ACK handshaking protocol, which uses 36pin CENIRONICS
socket (female)
The pin assignment of DB25 parallel interface is as Fig. 2-5 shows:
Pin No.
Signal
Direction
Description
1
STROBE
In
Strobe pulse to latch data, Reading
occurs at falling edge.
2
D1
In
These signals represent the 1st bit to
8th
bit
of
the
parallel
data
respectively ,each signal is at HIGH
level when data is logic 1, and LOW
when data is logic 0.
3
D2
In
4
D3
In
5
D4
In
6
D5
In
7
D6
In
